Drilling-machine.



No. 704,567. Patented July l5, I902. T. E. osmau. DRILLING MACHINE.

(Application filed Oct. 25, 1901.)

(No Model.)

v mt "asses UNITED STATES PATENT OFFICE.

THOMAS EDWARD OBRIEN, OF NARRABRI WEST, NEW SOUTH WVALES, AUSTRALIA.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 704,567, dated July 15, 1902.

- Application filed October 25, 1901. Serial No. 79,935. (No model.)

To (all whom it may c0nccrn:

Be it known that I, THOMAS EDWARD OBRIEN, blacksmith, a subject of theKing of Great Britain and Ireland, residing at Narrabri West, in theState of New South Wales, in the Commonwealth of Australia, haveinvented certain new and useful Improvements in Drilling-Machines; and Ido hereby declare that the following is a full, clear, and exactdescription of the inven tion,which willenable others skilled in the artto which it appertains to use the same.

My invention refers more particularly to those drilling-machines whichare used for boring holes to receive the wires in fencingposts. I

The object of my invention is to provide a machine so constructed thatboth hands of the operator are free to work the mechanism and wherebythe auger or drill can be readily withdrawn from the hole.

In the accompanying drawings, Figure 1 is a sketch showing my machine inoperation. Fig. 2 is a side elevation of my drilling-machine. Fig. 3 isa plan of same. Fig. 4 is a hinged support and foot-plate.

A is a metal frame, in the sides of which are the bearings carrying theworking mechanism'.

B B are handles keyed to the ends of the shaft 0, by means of which themiter-wheels D D are revolved and the spindle E, carrying the drill orauger, is rotated.

A is forward extended bearing, and A rearward bearing carrying thespindle E.

E is retaining-nut on end of spindle.

E shows a simple form of auger-grip on end of spindle.

A is a rearward extension of the frame, to the end of which is pivotallyconnected a sleeve H, which fits over and is adjustable on the hingedsupport J. This sleeve is held in any desired position on the support Jby means of the eccentric grip K. The'support J consists of aslightlyrearwardly bent bar (preferably constructed of metal tubing) hinged atits lower end to a light metal footplate L.

The method of operating my invention is clearly shown in Fig. 1. p

The sleeve H on the end of the drilling-machine is adjusted on thesupport J and secured by the grip K in the desired position,

the point of the auger being pressed into the post at the spot intowhich it is desired to bore. The operator then places one or both feeton the foot-plate and, leaning forward,

presses his shoulder against the support J and operates the handles withboth his hands.

In practice I have found it advantageous to give the support J arearward curve, as shown, as otherwise when boring in somepositi0ns--say near the bottom of a post-the top of the support mightcome into contact with the post before the auger had penetrated thedesired distance. When the hole has been bored through, the operatorsteps back, still retaining one foot on the'plate, and grips the top ofthe support J, when a straight rearward pull easily withdraws the augerand clears the hole. Although the primary use of my machine is theboring of fencing-posts, there are many other purposes for which it willbe found useful. is required to bore holes of considerable depth or atany angle-as, for instance, in the boring of shot-holes in acoal-seam-it will be found necessary to joint the upright, as shown inthe dotted lines, Fig. 4. This joint would preferably be a universaljoint. It would also be advisable in such cases to connect the sleeve tothe machine-frame by a universal joint.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- In a drilling apparatus, the combination with thedrill-frame of a sleeve connected therewith, an upright adj ustably heldin said sleeve and a footpiece pivotally connected to the lower end ofsaid upright, the upper portion of said upright extending up freelyabove the sleeve for contact with the shoulder of the operator,substantially as described.

In witness whereof I have hereunto aiflxed my signature, this 28th dayof August, 1901, in the presence of two witnesses.

THOMAS EDWARD OBRIEN.

Witnesses:

T. O. ALLEN, WALTER SIGMONT.

In such cases when it

